高温劣化后碱激发ECC修补材料与混凝土界面劈裂特性及微观机制

消防科学与技术 ›› 2025, Vol. 44 ›› Issue (12): 1806-1810.

高温劣化后碱激发ECC修补材料与混凝土界面劈裂特性及微观机制

陈庆伟^1,2, 曲占斐^1,2, 尹亮³, 刘纪一¹

（1.山东智源电力设计咨询有限公司，山东济南 250021； 2.国网山东省电力公司经济技术研究院，山东济南 250021； 3.应急管理部天津消防研究所，天津 300381）

收稿日期:2025-04-06 修回日期:2025-07-24 出版日期:2025-12-15 发布日期:2025-12-25
作者简介:陈庆伟，山东智源电力设计咨询有限公司，正高级工程师，主要从事电力工程施工及防火设计等方面的研究，山东省济南市槐荫区纬十路111号，250021。
基金资助:
山东智源电力设计咨询有限公司科技项目（ZY-2024-06）

Interfacial splitting characteristics and microscopic mechanisms of alkali-activated ECC repair materials and concrete after high-temperature deterioration

Chen Qingwei^1,2, Qu Zhanfei^1,2, Yin Liang³, Liu Jiyi¹

(1. Shandong Zhiyuan Electric Power Design & Consulting Co., Ltd., Jinan Shandong 250021, China; 2. State Grid Shandong Electric Power Company Economic and Technology Research Institute, Jinan Shandong 250021, China; 3. Tianjin Fire Science and Technology Research Institute of MEM, Tianjin 300381, China)

Received:2025-04-06 Revised:2025-07-24 Online:2025-12-15 Published:2025-12-25

摘要/Abstract

摘要： 碱激发矿渣基工程水泥基复合材料(Alkali-Activated Slag-Based Engineered Cementitious Composites, AAS-ECC)兼具ECC高韧性优势与碱矿渣胶凝材料的快硬早强、低碳特性，是极具潜力的高性能修补材料。然而其与混凝土基材间界面黏结机理及高温劣化机制尚未明确。本文对90个AAS-ECC修补普通混凝土复合试件开展了耐高温试验、高温后界面劈裂抗拉试验及微观分析试验。研究了不同温度作用下AAS-ECC水胶比、基体强度等级对复合试件界面粘接强度的影响机制。结果表明，修补试件界面劈裂抗拉强度随AAS-ECC水胶比的提高而降低。其随温度的升高呈现先增加后减小的变化规律。提高普通混凝土强度等级可提高修补试件界面粘接强度。研究结果可为AAS-ECC在修补工程和高温环境中的拓展应用提供数据支撑。

关键词: 工程水泥基复合材料, 修补材料, 高温作用, 界面劈裂抗拉强度, 微观分析

Abstract: Alkali-Activated Slag-Based Engineered Cementitious Composites (AAS-ECC) combines the high toughness advantage of ECC with the rapid hardening, early strength development and low-carbon properties of alkali-activated slag cementitious materials, making it a high-performance repair material with great potential. However, the interfacial bonding mechanism between AAS-ECC and concrete substrate as well as the high-temperature degradation mechanism remain unclear. To address this, 90 composite specimens of ordinary concrete repaired with AAS-ECC were subjected to high-temperature resistance tests, interfacial splitting tensile strength tests after high-temperature exposure, and microscopic analysis tests. The influence mechanisms of AAS-ECC water-binder ratio and matrix strength grade on the interfacial bonding strength of composite specimens under different temperature conditions were investigated. The results show that the interfacial splitting tensile strength of the repaired specimens decreases with the increase of AAS-ECC water-binder ratio. It exhibits a variation law of first increasing and then decreasing with the rise of temperature. Increasing the strength grade of ordinary concrete can enhance the interfacial bonding strength of the repaired specimens. The research results provide data support for the extended application of AAS-ECC in repair engineering and high-temperature environments.

Key words: engineered cementitious composites, patching materials, high temperature, interface splitting tensile strength, micro-analysis

陈庆伟, 曲占斐, 尹亮, 刘纪一. 高温劣化后碱激发ECC修补材料与混凝土界面劈裂特性及微观机制[J]. 消防科学与技术, 2025, 44(12): 1806-1810.

Chen Qingwei, Qu Zhanfei, Yin Liang, Liu Jiyi. Interfacial splitting characteristics and microscopic mechanisms of alkali-activated ECC repair materials and concrete after high-temperature deterioration[J]. Fire Science and Technology, 2025, 44(12): 1806-1810.